Behavioural Insights Projects

Finding ways to encourage collective action in contexts where only a minority adopts the desired behaviour is central to solving many of today's global environmental problems. We study how correcting people's beliefs about social norms and behavioural trends encourages collective action in a setting where the desired behaviour is not yet prevalent. In a field experiment, we test whether low sign-up rates for a municipal recycling program in urban Peru can be increased by providing information…

Institution: German Institute of Development and Sustainability (IDOS)

Team: Research team: Hanna Fuhrmann-Riebel, Ben D'Exelle, Kristian López Vargas, Sebastian Tonke & Arjan Verschoor

In a pre-registered experiment, we tested whether expert endorsement increases the effectiveness of debunking messages about COVID-19 vaccines. We monitored a sample of 2,277 people in Italy through a longitudinal study along the salient phases of the vaccination campaign. Participants received a series of messages endorsed by either medical researchers (experimental group) or by generic others (control). In order to minimise demand effects, we collected participants’ responses always at ten…

Institution: Vita-salute San Raffaele University

In line with the Government of Canada's National Adaptation Strategy, this project seeks to further understanding of Canadians’ awareness and adoption of measures intended to mitigate wildfire risk toward the end of supporting and empowering more widespread action. The study is a survey with an embedded randomized controlled trial component. The survey component of the study aims to address questions such as: 1. What are the barriers to more widespread adoption of wildland fire risk reduction…

Institution: Impact and Innovation Hub (IIU)- Impact Canada

Team: Impact and Innovation Unit (IIU)

Methods Two preregistered randomized controlled trials (N = 253 and N = 674) measured consumption in a lab and the home environment. Cues were salient, labeled stripes that demarcated single portions. Participants were randomized to cue condition or control. Consumption was measured without awareness. Results The main preregistered effect of the visual cue was not statistically significant. There was some variation by subgroup. In Study 1, men were more likely to eat the whole can of potato…

Institution: Economic and Social Research Institute (ESRI)

Team: ESRI Behavioural Research Unit

We seek to increase voluntary appearances for people with outstanding Warrants to Arrest (WTA) through reminder phone calls from Māori Wardens and Police. This Auckland-based project follows a proof-of-concept trial in the Eastern District, in which Māori Wardens made phone calls to people with outstanding WTAs and we compared voluntary appearances for those who were reached via phone to those who were not. While this first trial showed indicative evidence that phone calls may be effective,…

Institution: Other

Team: Behavioural Science Aotearoa

ideas24 partnered with the Practical Farmers of Iowa (PFI) to better understand the behavioral barriers preventing corn and soybean farmers from adopting cover crops and enrolling in PFI's cover-crop cost-share program. Using what we learned from administrative data, farmer interviews and direct feedback during user-testing, we then jointly designed behaviorally informed communication interventions, which included mailers as well as a farmer referral campaign. To evaluate the potential impact of…

Institution: Ideas42

Team: Ideas42

In connection with the 2022 county elections, an experiment was conducted in Finland for the first time to examine the impact of text message reminders on the voting turnout of young people. In the experiment, young people (aged 18 to 29) were messaged twice about the schedule of the county elections and their right to vote. The aim of the study was to find out whether a text message reminder increases voting turnout. The experiment was carried out in cooperation with the Ministry of Justice and…

Institution: Prime Minister's Office - Finland

Team: Finnish Behavioural Policy Unit

How can response rates to questionnaires be increased? In the first quarter of 2023, some of the participants in a CBS survey received a letter in which the call-to-action appeared as far as possible at the top of the letter. The other participants received standard letters. The analyses showed that the standard letters produced a significantly higher response rate than the letters in which the call-to-action was placed at the top. Why this experiment was conducted: high response rate is…

Institution: Statistics Netherlands (CBS)

PROJECT SUMMARY Teachers in a summer school program for high school students provided brief, individualized, messages for parents with information about their child’s performance and behavior in school on a weekly basis. IMPACT Providing parents with individualized messages increased the probability a student earned credit for each class by 6.5 percentage points – a 41% reduction in failure rates.

Institution: Harvard Kennedy School

Team: Behavioural Insights Group

A series of controlled randomised experiments was conducted to examine the savings effects for households of three types of energy consumption managers tools: an email + web application, an app installed on a smartphone or tablet and an in-home display. Energy savings could only be established for the in-home display: almost 7% on natural gas and over 2% on electricity consumption. Why this experiment was conducted: The Netherlands' climate targets Energy consumption by Dutch households…

Institution: PBL Netherlands Environmental Assessment Agency